I have an intermittent issue where my radio will shut off and my abs light will come on the same time. Obvious ground issue right?

I did the big 3 awhile ago. Replaced the following wires with gauge 4

Tranny to fuse box
Fuse box to neg terminal
Chassis to engine

I've tried turning my music up, and wiggling all the wires around waiting for something to shut off and narrow down what's wrong. Nothing yet. Only when I'm driving.

Could this be any other issue before I go sanding, cleaning, and reseating all my wiring again?

One time I went to start my car, lights came on briefly then everything just shut off. Went to try to start it again and I got nothing, no lights or anything until I waited 5min and it started right up.
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Everything is fixed.

I didn't sand the paint off when connecting grounds. I thought if OE didn't have to, why do I?

Well OE ground cables have little points that I believe stake into the body of the car slightly.

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